contourcolor.php
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<?php
require_once("../lib/phpchartdir.php");
function createChart($viewer, $chartIndex)
{
# The x and y coordinates of the grid
$dataX = array(-4, -3, -2, -1, 0, 1, 2, 3, 4);
$dataY = array(-4, -3, -2, -1, 0, 1, 2, 3, 4);
# Use random numbers for the z values on the XY grid
$r = new RanSeries(99);
$dataZ = $r->get2DSeries(count($dataX), count($dataY), -0.9, 0.9);
# Create a XYChart object of size 420 x 360 pixels
$c = new XYChart(420, 360);
# Set the plotarea at (30, 25) and of size 300 x 300 pixels. Use semi-transparent grey
# (0xdd000000) horizontal and vertical grid lines
$c->setPlotArea(30, 25, 300, 300, -1, -1, -1, 0xdd000000, -1);
# Set the x-axis and y-axis scale
$c->xAxis->setLinearScale(-4, 4, 1);
$c->yAxis->setLinearScale(-4, 4, 1);
# Add a contour layer using the given data
$layer = $c->addContourLayer($dataX, $dataY, $dataZ);
# Enable contour label by setting its style to black (000000) 8pt default bold font
$layer->setContourLabelStyle("bold", 8, 0x000000);
# Set the label to display the value in a CDML block with semi-transparent white (4FFFFFFF)
# background and 2 pixels left/right margin and 1 pixel top/bottom margin
$layer->setContourLabelFormat("<*block,bgcolor=4FFFFFFF,margin=2 2 1 1*>{value}");
# Move the grid lines in front of the contour layer
$c->getPlotArea()->moveGridBefore($layer);
# Add a color axis (the legend) in which the top left corner is anchored at (350, 25). Set the
# length to 400 300 and the labels on the right side.
$cAxis = $layer->setColorAxis(350, 25, TopLeft, 300, Right);
if ($chartIndex == 1) {
# Speicify a color gradient as a list of colors, and use it in the color axis.
$colorGradient = array(0x0044cc, 0xffffff, 0x00aa00);
$cAxis->setColorGradient(false, $colorGradient);
} else if ($chartIndex == 2) {
# Specify the color scale to use in the color axis
$colorScale = array(-1.0, 0x1a9850, -0.75, 0x66bd63, -0.5, 0xa6d96a, -0.25, 0xd9ef8b, 0,
0xfee08b, 0.25, 0xfdae61, 0.5, 0xf46d43, 0.75, 0xd73027, 1);
$cAxis->setColorScale($colorScale);
} else if ($chartIndex == 3) {
# Specify the color scale to use in the color axis. Also specify an underflow color 0x66ccff
# (blue) for regions that fall below the lower axis limit.
$colorScale = array(0, 0xffff99, 0.2, 0x80cdc1, 0.4, 0x35978f, 0.6, 0x01665e, 0.8, 0x003c30,
1);
$cAxis->setColorScale($colorScale, 0x66ccff);
}
# Output the chart
$viewer->setChart($c, SVG);
# Include tool tip for the chart
$viewer->setImageMap($c->getHTMLImageMap("", "",
"title='<*cdml*><*b*>X: {x|2}<*br*>Y: {y|2}<*br*>Z: {z|2}'"));
# Output Javascript chart model to support contour chart tooltips
$viewer->setChartModel($c->getJsChartModel());
}
# This example includes 4 charts
$viewers = array();
for ($i = 0; $i < 4; ++$i) {
$viewers[$i] = new WebChartViewer("chart$i");
createChart($viewers[$i], $i);
}
?>
<!DOCTYPE html>
<html>
<head>
<title>Contour Color Scale</title>
<!-- Include ChartDirector Javascript Library to support chart interactions -->
<script type="text/javascript" src="cdjcv.js"></script>
</head>
<body style="margin:5px 0px 0px 5px">
<div style="font:bold 18pt verdana;">
Contour Color Scale
</div>
<hr style="border:solid 1px #000080; background:#000080" />
<div style="font:10pt verdana; margin-bottom:1.5em">
<a href="viewsource.php?file=<?=basename(__FILE__)?>">View Chart Source Code</a>
</div>
<!-- ****** Here are the chart images ****** -->
<?php
for ($i = 0; $i < count($viewers); ++$i) {
echo $viewers[$i]->renderHTML(), " ";
}
?>
</body>
</html>
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